>>There seems to be a bit of wiggle room in the word “lawfully”, but perhaps I’m just paranoid of the 9th Circus.<<
There are a lot of reasons for the word “lawfully”. For one thing, removing that specific would imply that even those that are “unlawfully” armed are included in the spirit of the comment. It is the way lawyers talk: try to be specific.
Agree with your lawyer reference, but "laws" can be changed so I would prefer if the 9th Circuit wrote "constitutionally armed" in their opinion. Again, just paranoid.